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Sony XPERIA XZ Premium – Android 9.0.0 – 47.2.A.0.306



1. how to install firmware for Sony XPERIA XZ Premium

a) download and install latest Flashtool
b) download OS for your Sony XPERIA XZ Premium (you can choose from list below)
b3) download Android 9.0.0 for Sony XPERIA XZ Premium G8142
b2) 
download Android 8.0.0 Oreo (mirror) for Sony XPERIA XZ Premium G8141
b3) download Android 8.0.0 Oreo (mirror) for Sony XPERIA XZ Premium G8142
c) open the XPERIA Flashtool, click on flash and choose downloaded firmware, than click ok. Important – if you do not want to delete any data of your phone, just uncheck flashing userdata.sin file. All data will remain in your phone, but sometimes it can cause additional troubles. So it is better (and I recommend that) to do the backup of your personal data, than proceed with clean instalation and then restore your personal data.
d) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding volume down button
e) after few minutes all is done and your phone gets new firmware

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